Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2001-2002 by David Brownell | |
53bd6a60 | 3 | * |
1da177e4 LT |
4 | * This program is free software; you can redistribute it and/or modify it |
5 | * under the terms of the GNU General Public License as published by the | |
6 | * Free Software Foundation; either version 2 of the License, or (at your | |
7 | * option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
11 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 | * for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software Foundation, | |
16 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
17 | */ | |
18 | ||
19 | /* this file is part of ehci-hcd.c */ | |
20 | ||
21 | #define ehci_dbg(ehci, fmt, args...) \ | |
22 | dev_dbg (ehci_to_hcd(ehci)->self.controller , fmt , ## args ) | |
23 | #define ehci_err(ehci, fmt, args...) \ | |
24 | dev_err (ehci_to_hcd(ehci)->self.controller , fmt , ## args ) | |
25 | #define ehci_info(ehci, fmt, args...) \ | |
26 | dev_info (ehci_to_hcd(ehci)->self.controller , fmt , ## args ) | |
27 | #define ehci_warn(ehci, fmt, args...) \ | |
28 | dev_warn (ehci_to_hcd(ehci)->self.controller , fmt , ## args ) | |
29 | ||
9776afc8 | 30 | #ifdef VERBOSE_DEBUG |
1da177e4 LT |
31 | # define ehci_vdbg ehci_dbg |
32 | #else | |
9a1cadb9 | 33 | static inline void ehci_vdbg(struct ehci_hcd *ehci, ...) {} |
1da177e4 LT |
34 | #endif |
35 | ||
36 | #ifdef DEBUG | |
37 | ||
38 | /* check the values in the HCSPARAMS register | |
39 | * (host controller _Structural_ parameters) | |
40 | * see EHCI spec, Table 2-4 for each value | |
41 | */ | |
42 | static void dbg_hcs_params (struct ehci_hcd *ehci, char *label) | |
43 | { | |
083522d7 | 44 | u32 params = ehci_readl(ehci, &ehci->caps->hcs_params); |
1da177e4 LT |
45 | |
46 | ehci_dbg (ehci, | |
47 | "%s hcs_params 0x%x dbg=%d%s cc=%d pcc=%d%s%s ports=%d\n", | |
48 | label, params, | |
49 | HCS_DEBUG_PORT (params), | |
50 | HCS_INDICATOR (params) ? " ind" : "", | |
51 | HCS_N_CC (params), | |
52 | HCS_N_PCC (params), | |
6dbd682b | 53 | HCS_PORTROUTED (params) ? "" : " ordered", |
1da177e4 LT |
54 | HCS_PPC (params) ? "" : " !ppc", |
55 | HCS_N_PORTS (params) | |
56 | ); | |
57 | /* Port routing, per EHCI 0.95 Spec, Section 2.2.5 */ | |
58 | if (HCS_PORTROUTED (params)) { | |
59 | int i; | |
60 | char buf [46], tmp [7], byte; | |
61 | ||
62 | buf[0] = 0; | |
63 | for (i = 0; i < HCS_N_PORTS (params); i++) { | |
64 | // FIXME MIPS won't readb() ... | |
65 | byte = readb (&ehci->caps->portroute[(i>>1)]); | |
53bd6a60 | 66 | sprintf(tmp, "%d ", |
1da177e4 LT |
67 | ((i & 0x1) ? ((byte)&0xf) : ((byte>>4)&0xf))); |
68 | strcat(buf, tmp); | |
69 | } | |
70 | ehci_dbg (ehci, "%s portroute %s\n", | |
71 | label, buf); | |
72 | } | |
73 | } | |
74 | #else | |
75 | ||
76 | static inline void dbg_hcs_params (struct ehci_hcd *ehci, char *label) {} | |
77 | ||
78 | #endif | |
79 | ||
80 | #ifdef DEBUG | |
81 | ||
82 | /* check the values in the HCCPARAMS register | |
83 | * (host controller _Capability_ parameters) | |
84 | * see EHCI Spec, Table 2-5 for each value | |
85 | * */ | |
86 | static void dbg_hcc_params (struct ehci_hcd *ehci, char *label) | |
87 | { | |
083522d7 | 88 | u32 params = ehci_readl(ehci, &ehci->caps->hcc_params); |
1da177e4 LT |
89 | |
90 | if (HCC_ISOC_CACHE (params)) { | |
91 | ehci_dbg (ehci, | |
6dbd682b SR |
92 | "%s hcc_params %04x caching frame %s%s%s\n", |
93 | label, params, | |
94 | HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024", | |
95 | HCC_CANPARK(params) ? " park" : "", | |
96 | HCC_64BIT_ADDR(params) ? " 64 bit addr" : ""); | |
1da177e4 LT |
97 | } else { |
98 | ehci_dbg (ehci, | |
aa4d8342 | 99 | "%s hcc_params %04x thresh %d uframes %s%s%s%s%s%s%s\n", |
6dbd682b SR |
100 | label, |
101 | params, | |
102 | HCC_ISOC_THRES(params), | |
103 | HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024", | |
104 | HCC_CANPARK(params) ? " park" : "", | |
aa4d8342 AD |
105 | HCC_64BIT_ADDR(params) ? " 64 bit addr" : "", |
106 | HCC_LPM(params) ? " LPM" : "", | |
107 | HCC_PER_PORT_CHANGE_EVENT(params) ? " ppce" : "", | |
108 | HCC_HW_PREFETCH(params) ? " hw prefetch" : "", | |
109 | HCC_32FRAME_PERIODIC_LIST(params) ? | |
855ef452 | 110 | " 32 periodic list" : ""); |
1da177e4 LT |
111 | } |
112 | } | |
113 | #else | |
114 | ||
115 | static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {} | |
116 | ||
117 | #endif | |
118 | ||
119 | #ifdef DEBUG | |
120 | ||
8234509c | 121 | static void __maybe_unused |
1da177e4 LT |
122 | dbg_qtd (const char *label, struct ehci_hcd *ehci, struct ehci_qtd *qtd) |
123 | { | |
6dbd682b SR |
124 | ehci_dbg(ehci, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd, |
125 | hc32_to_cpup(ehci, &qtd->hw_next), | |
126 | hc32_to_cpup(ehci, &qtd->hw_alt_next), | |
127 | hc32_to_cpup(ehci, &qtd->hw_token), | |
128 | hc32_to_cpup(ehci, &qtd->hw_buf [0])); | |
1da177e4 | 129 | if (qtd->hw_buf [1]) |
6dbd682b SR |
130 | ehci_dbg(ehci, " p1=%08x p2=%08x p3=%08x p4=%08x\n", |
131 | hc32_to_cpup(ehci, &qtd->hw_buf[1]), | |
132 | hc32_to_cpup(ehci, &qtd->hw_buf[2]), | |
133 | hc32_to_cpup(ehci, &qtd->hw_buf[3]), | |
134 | hc32_to_cpup(ehci, &qtd->hw_buf[4])); | |
1da177e4 LT |
135 | } |
136 | ||
8234509c | 137 | static void __maybe_unused |
1da177e4 LT |
138 | dbg_qh (const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh) |
139 | { | |
3807e26d AD |
140 | struct ehci_qh_hw *hw = qh->hw; |
141 | ||
1da177e4 | 142 | ehci_dbg (ehci, "%s qh %p n%08x info %x %x qtd %x\n", label, |
3807e26d AD |
143 | qh, hw->hw_next, hw->hw_info1, hw->hw_info2, hw->hw_current); |
144 | dbg_qtd("overlay", ehci, (struct ehci_qtd *) &hw->hw_qtd_next); | |
1da177e4 LT |
145 | } |
146 | ||
8234509c | 147 | static void __maybe_unused |
53bd6a60 | 148 | dbg_itd (const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd) |
1da177e4 LT |
149 | { |
150 | ehci_dbg (ehci, "%s [%d] itd %p, next %08x, urb %p\n", | |
6dbd682b SR |
151 | label, itd->frame, itd, hc32_to_cpu(ehci, itd->hw_next), |
152 | itd->urb); | |
1da177e4 | 153 | ehci_dbg (ehci, |
53bd6a60 | 154 | " trans: %08x %08x %08x %08x %08x %08x %08x %08x\n", |
6dbd682b SR |
155 | hc32_to_cpu(ehci, itd->hw_transaction[0]), |
156 | hc32_to_cpu(ehci, itd->hw_transaction[1]), | |
157 | hc32_to_cpu(ehci, itd->hw_transaction[2]), | |
158 | hc32_to_cpu(ehci, itd->hw_transaction[3]), | |
159 | hc32_to_cpu(ehci, itd->hw_transaction[4]), | |
160 | hc32_to_cpu(ehci, itd->hw_transaction[5]), | |
161 | hc32_to_cpu(ehci, itd->hw_transaction[6]), | |
162 | hc32_to_cpu(ehci, itd->hw_transaction[7])); | |
1da177e4 | 163 | ehci_dbg (ehci, |
53bd6a60 | 164 | " buf: %08x %08x %08x %08x %08x %08x %08x\n", |
6dbd682b SR |
165 | hc32_to_cpu(ehci, itd->hw_bufp[0]), |
166 | hc32_to_cpu(ehci, itd->hw_bufp[1]), | |
167 | hc32_to_cpu(ehci, itd->hw_bufp[2]), | |
168 | hc32_to_cpu(ehci, itd->hw_bufp[3]), | |
169 | hc32_to_cpu(ehci, itd->hw_bufp[4]), | |
170 | hc32_to_cpu(ehci, itd->hw_bufp[5]), | |
171 | hc32_to_cpu(ehci, itd->hw_bufp[6])); | |
1da177e4 LT |
172 | ehci_dbg (ehci, " index: %d %d %d %d %d %d %d %d\n", |
173 | itd->index[0], itd->index[1], itd->index[2], | |
174 | itd->index[3], itd->index[4], itd->index[5], | |
175 | itd->index[6], itd->index[7]); | |
176 | } | |
177 | ||
8234509c | 178 | static void __maybe_unused |
53bd6a60 | 179 | dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd) |
1da177e4 LT |
180 | { |
181 | ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n", | |
6dbd682b SR |
182 | label, sitd->frame, sitd, hc32_to_cpu(ehci, sitd->hw_next), |
183 | sitd->urb); | |
1da177e4 | 184 | ehci_dbg (ehci, |
53bd6a60 | 185 | " addr %08x sched %04x result %08x buf %08x %08x\n", |
6dbd682b SR |
186 | hc32_to_cpu(ehci, sitd->hw_fullspeed_ep), |
187 | hc32_to_cpu(ehci, sitd->hw_uframe), | |
188 | hc32_to_cpu(ehci, sitd->hw_results), | |
189 | hc32_to_cpu(ehci, sitd->hw_buf[0]), | |
190 | hc32_to_cpu(ehci, sitd->hw_buf[1])); | |
1da177e4 LT |
191 | } |
192 | ||
8234509c | 193 | static int __maybe_unused |
1da177e4 LT |
194 | dbg_status_buf (char *buf, unsigned len, const char *label, u32 status) |
195 | { | |
196 | return scnprintf (buf, len, | |
aa4d8342 | 197 | "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s%s", |
1da177e4 | 198 | label, label [0] ? " " : "", status, |
aa4d8342 | 199 | (status & STS_PPCE_MASK) ? " PPCE" : "", |
1da177e4 LT |
200 | (status & STS_ASS) ? " Async" : "", |
201 | (status & STS_PSS) ? " Periodic" : "", | |
202 | (status & STS_RECL) ? " Recl" : "", | |
203 | (status & STS_HALT) ? " Halt" : "", | |
204 | (status & STS_IAA) ? " IAA" : "", | |
205 | (status & STS_FATAL) ? " FATAL" : "", | |
206 | (status & STS_FLR) ? " FLR" : "", | |
207 | (status & STS_PCD) ? " PCD" : "", | |
208 | (status & STS_ERR) ? " ERR" : "", | |
209 | (status & STS_INT) ? " INT" : "" | |
210 | ); | |
211 | } | |
212 | ||
8234509c | 213 | static int __maybe_unused |
1da177e4 LT |
214 | dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable) |
215 | { | |
216 | return scnprintf (buf, len, | |
aa4d8342 | 217 | "%s%sintrenable %02x%s%s%s%s%s%s%s", |
1da177e4 | 218 | label, label [0] ? " " : "", enable, |
aa4d8342 | 219 | (enable & STS_PPCE_MASK) ? " PPCE" : "", |
1da177e4 LT |
220 | (enable & STS_IAA) ? " IAA" : "", |
221 | (enable & STS_FATAL) ? " FATAL" : "", | |
222 | (enable & STS_FLR) ? " FLR" : "", | |
223 | (enable & STS_PCD) ? " PCD" : "", | |
224 | (enable & STS_ERR) ? " ERR" : "", | |
225 | (enable & STS_INT) ? " INT" : "" | |
226 | ); | |
227 | } | |
228 | ||
229 | static const char *const fls_strings [] = | |
230 | { "1024", "512", "256", "??" }; | |
231 | ||
232 | static int | |
233 | dbg_command_buf (char *buf, unsigned len, const char *label, u32 command) | |
234 | { | |
235 | return scnprintf (buf, len, | |
aa4d8342 AD |
236 | "%s%scommand %07x %s%s%s%s%s%s=%d ithresh=%d%s%s%s%s " |
237 | "period=%s%s %s", | |
1da177e4 | 238 | label, label [0] ? " " : "", command, |
aa4d8342 AD |
239 | (command & CMD_HIRD) ? " HIRD" : "", |
240 | (command & CMD_PPCEE) ? " PPCEE" : "", | |
241 | (command & CMD_FSP) ? " FSP" : "", | |
242 | (command & CMD_ASPE) ? " ASPE" : "", | |
243 | (command & CMD_PSPE) ? " PSPE" : "", | |
244 | (command & CMD_PARK) ? " park" : "(park)", | |
1da177e4 LT |
245 | CMD_PARK_CNT (command), |
246 | (command >> 16) & 0x3f, | |
247 | (command & CMD_LRESET) ? " LReset" : "", | |
248 | (command & CMD_IAAD) ? " IAAD" : "", | |
249 | (command & CMD_ASE) ? " Async" : "", | |
250 | (command & CMD_PSE) ? " Periodic" : "", | |
251 | fls_strings [(command >> 2) & 0x3], | |
252 | (command & CMD_RESET) ? " Reset" : "", | |
253 | (command & CMD_RUN) ? "RUN" : "HALT" | |
254 | ); | |
255 | } | |
256 | ||
257 | static int | |
258 | dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status) | |
259 | { | |
260 | char *sig; | |
261 | ||
262 | /* signaling state */ | |
263 | switch (status & (3 << 10)) { | |
264 | case 0 << 10: sig = "se0"; break; | |
265 | case 1 << 10: sig = "k"; break; /* low speed */ | |
266 | case 2 << 10: sig = "j"; break; | |
267 | default: sig = "?"; break; | |
268 | } | |
269 | ||
270 | return scnprintf (buf, len, | |
aa4d8342 AD |
271 | "%s%sport:%d status %06x %d %s%s%s%s%s%s " |
272 | "sig=%s%s%s%s%s%s%s%s%s%s%s", | |
1da177e4 | 273 | label, label [0] ? " " : "", port, status, |
aa4d8342 AD |
274 | status>>25,/*device address */ |
275 | (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ACK ? | |
276 | " ACK" : "", | |
277 | (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_NYET ? | |
278 | " NYET" : "", | |
279 | (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_STALL ? | |
280 | " STALL" : "", | |
281 | (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ERR ? | |
282 | " ERR" : "", | |
1da177e4 LT |
283 | (status & PORT_POWER) ? " POWER" : "", |
284 | (status & PORT_OWNER) ? " OWNER" : "", | |
285 | sig, | |
aa4d8342 | 286 | (status & PORT_LPM) ? " LPM" : "", |
1da177e4 LT |
287 | (status & PORT_RESET) ? " RESET" : "", |
288 | (status & PORT_SUSPEND) ? " SUSPEND" : "", | |
289 | (status & PORT_RESUME) ? " RESUME" : "", | |
290 | (status & PORT_OCC) ? " OCC" : "", | |
291 | (status & PORT_OC) ? " OC" : "", | |
292 | (status & PORT_PEC) ? " PEC" : "", | |
293 | (status & PORT_PE) ? " PE" : "", | |
294 | (status & PORT_CSC) ? " CSC" : "", | |
6dbd682b | 295 | (status & PORT_CONNECT) ? " CONNECT" : ""); |
1da177e4 LT |
296 | } |
297 | ||
298 | #else | |
8234509c | 299 | static inline void __maybe_unused |
1da177e4 LT |
300 | dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh) |
301 | {} | |
302 | ||
8234509c | 303 | static inline int __maybe_unused |
1da177e4 LT |
304 | dbg_status_buf (char *buf, unsigned len, const char *label, u32 status) |
305 | { return 0; } | |
306 | ||
8234509c | 307 | static inline int __maybe_unused |
1da177e4 LT |
308 | dbg_command_buf (char *buf, unsigned len, const char *label, u32 command) |
309 | { return 0; } | |
310 | ||
8234509c | 311 | static inline int __maybe_unused |
1da177e4 LT |
312 | dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable) |
313 | { return 0; } | |
314 | ||
8234509c | 315 | static inline int __maybe_unused |
1da177e4 LT |
316 | dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status) |
317 | { return 0; } | |
318 | ||
319 | #endif /* DEBUG */ | |
320 | ||
321 | /* functions have the "wrong" filename when they're output... */ | |
322 | #define dbg_status(ehci, label, status) { \ | |
323 | char _buf [80]; \ | |
324 | dbg_status_buf (_buf, sizeof _buf, label, status); \ | |
325 | ehci_dbg (ehci, "%s\n", _buf); \ | |
326 | } | |
327 | ||
328 | #define dbg_cmd(ehci, label, command) { \ | |
329 | char _buf [80]; \ | |
330 | dbg_command_buf (_buf, sizeof _buf, label, command); \ | |
331 | ehci_dbg (ehci, "%s\n", _buf); \ | |
332 | } | |
333 | ||
334 | #define dbg_port(ehci, label, port, status) { \ | |
335 | char _buf [80]; \ | |
336 | dbg_port_buf (_buf, sizeof _buf, label, port, status); \ | |
337 | ehci_dbg (ehci, "%s\n", _buf); \ | |
338 | } | |
339 | ||
340 | /*-------------------------------------------------------------------------*/ | |
341 | ||
342 | #ifdef STUB_DEBUG_FILES | |
343 | ||
344 | static inline void create_debug_files (struct ehci_hcd *bus) { } | |
345 | static inline void remove_debug_files (struct ehci_hcd *bus) { } | |
346 | ||
347 | #else | |
348 | ||
694cc208 TJ |
349 | /* troubleshooting help: expose state in debugfs */ |
350 | ||
351 | static int debug_async_open(struct inode *, struct file *); | |
352 | static int debug_periodic_open(struct inode *, struct file *); | |
353 | static int debug_registers_open(struct inode *, struct file *); | |
354 | static int debug_async_open(struct inode *, struct file *); | |
aa4d8342 AD |
355 | static ssize_t debug_lpm_read(struct file *file, char __user *user_buf, |
356 | size_t count, loff_t *ppos); | |
357 | static ssize_t debug_lpm_write(struct file *file, const char __user *buffer, | |
358 | size_t count, loff_t *ppos); | |
359 | static int debug_lpm_close(struct inode *inode, struct file *file); | |
360 | ||
694cc208 TJ |
361 | static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*); |
362 | static int debug_close(struct inode *, struct file *); | |
363 | ||
364 | static const struct file_operations debug_async_fops = { | |
365 | .owner = THIS_MODULE, | |
366 | .open = debug_async_open, | |
367 | .read = debug_output, | |
368 | .release = debug_close, | |
6038f373 | 369 | .llseek = default_llseek, |
694cc208 TJ |
370 | }; |
371 | static const struct file_operations debug_periodic_fops = { | |
372 | .owner = THIS_MODULE, | |
373 | .open = debug_periodic_open, | |
374 | .read = debug_output, | |
375 | .release = debug_close, | |
6038f373 | 376 | .llseek = default_llseek, |
694cc208 TJ |
377 | }; |
378 | static const struct file_operations debug_registers_fops = { | |
379 | .owner = THIS_MODULE, | |
380 | .open = debug_registers_open, | |
381 | .read = debug_output, | |
382 | .release = debug_close, | |
6038f373 | 383 | .llseek = default_llseek, |
694cc208 | 384 | }; |
aa4d8342 AD |
385 | static const struct file_operations debug_lpm_fops = { |
386 | .owner = THIS_MODULE, | |
234e3405 | 387 | .open = simple_open, |
aa4d8342 AD |
388 | .read = debug_lpm_read, |
389 | .write = debug_lpm_write, | |
390 | .release = debug_lpm_close, | |
6038f373 | 391 | .llseek = noop_llseek, |
aa4d8342 | 392 | }; |
694cc208 TJ |
393 | |
394 | static struct dentry *ehci_debug_root; | |
395 | ||
396 | struct debug_buffer { | |
397 | ssize_t (*fill_func)(struct debug_buffer *); /* fill method */ | |
398 | struct usb_bus *bus; | |
399 | struct mutex mutex; /* protect filling of buffer */ | |
400 | size_t count; /* number of characters filled into buffer */ | |
3c04e20e ML |
401 | char *output_buf; |
402 | size_t alloc_size; | |
694cc208 | 403 | }; |
1da177e4 LT |
404 | |
405 | #define speed_char(info1) ({ char tmp; \ | |
406 | switch (info1 & (3 << 12)) { \ | |
407 | case 0 << 12: tmp = 'f'; break; \ | |
408 | case 1 << 12: tmp = 'l'; break; \ | |
409 | case 2 << 12: tmp = 'h'; break; \ | |
410 | default: tmp = '?'; break; \ | |
411 | }; tmp; }) | |
412 | ||
6dbd682b | 413 | static inline char token_mark(struct ehci_hcd *ehci, __hc32 token) |
1da177e4 | 414 | { |
6dbd682b SR |
415 | __u32 v = hc32_to_cpu(ehci, token); |
416 | ||
1da177e4 LT |
417 | if (v & QTD_STS_ACTIVE) |
418 | return '*'; | |
419 | if (v & QTD_STS_HALT) | |
420 | return '-'; | |
421 | if (!IS_SHORT_READ (v)) | |
422 | return ' '; | |
423 | /* tries to advance through hw_alt_next */ | |
424 | return '/'; | |
425 | } | |
426 | ||
427 | static void qh_lines ( | |
428 | struct ehci_hcd *ehci, | |
429 | struct ehci_qh *qh, | |
430 | char **nextp, | |
431 | unsigned *sizep | |
432 | ) | |
433 | { | |
434 | u32 scratch; | |
435 | u32 hw_curr; | |
436 | struct list_head *entry; | |
437 | struct ehci_qtd *td; | |
438 | unsigned temp; | |
439 | unsigned size = *sizep; | |
440 | char *next = *nextp; | |
441 | char mark; | |
fd05e720 | 442 | __le32 list_end = EHCI_LIST_END(ehci); |
3807e26d | 443 | struct ehci_qh_hw *hw = qh->hw; |
1da177e4 | 444 | |
3807e26d | 445 | if (hw->hw_qtd_next == list_end) /* NEC does this */ |
1da177e4 LT |
446 | mark = '@'; |
447 | else | |
3807e26d | 448 | mark = token_mark(ehci, hw->hw_token); |
1da177e4 | 449 | if (mark == '/') { /* qh_alt_next controls qh advance? */ |
3807e26d AD |
450 | if ((hw->hw_alt_next & QTD_MASK(ehci)) |
451 | == ehci->async->hw->hw_alt_next) | |
1da177e4 | 452 | mark = '#'; /* blocked */ |
3807e26d | 453 | else if (hw->hw_alt_next == list_end) |
1da177e4 LT |
454 | mark = '.'; /* use hw_qtd_next */ |
455 | /* else alt_next points to some other qtd */ | |
456 | } | |
3807e26d AD |
457 | scratch = hc32_to_cpup(ehci, &hw->hw_info1); |
458 | hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0; | |
1da177e4 LT |
459 | temp = scnprintf (next, size, |
460 | "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)", | |
461 | qh, scratch & 0x007f, | |
462 | speed_char (scratch), | |
463 | (scratch >> 8) & 0x000f, | |
3807e26d AD |
464 | scratch, hc32_to_cpup(ehci, &hw->hw_info2), |
465 | hc32_to_cpup(ehci, &hw->hw_token), mark, | |
466 | (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token) | |
1da177e4 | 467 | ? "data1" : "data0", |
3807e26d | 468 | (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f); |
1da177e4 LT |
469 | size -= temp; |
470 | next += temp; | |
471 | ||
472 | /* hc may be modifying the list as we read it ... */ | |
473 | list_for_each (entry, &qh->qtd_list) { | |
474 | td = list_entry (entry, struct ehci_qtd, qtd_list); | |
6dbd682b | 475 | scratch = hc32_to_cpup(ehci, &td->hw_token); |
1da177e4 LT |
476 | mark = ' '; |
477 | if (hw_curr == td->qtd_dma) | |
478 | mark = '*'; | |
3807e26d | 479 | else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma)) |
1da177e4 LT |
480 | mark = '+'; |
481 | else if (QTD_LENGTH (scratch)) { | |
3807e26d | 482 | if (td->hw_alt_next == ehci->async->hw->hw_alt_next) |
1da177e4 | 483 | mark = '#'; |
6dbd682b | 484 | else if (td->hw_alt_next != list_end) |
1da177e4 LT |
485 | mark = '/'; |
486 | } | |
487 | temp = snprintf (next, size, | |
488 | "\n\t%p%c%s len=%d %08x urb %p", | |
489 | td, mark, ({ char *tmp; | |
490 | switch ((scratch>>8)&0x03) { | |
491 | case 0: tmp = "out"; break; | |
492 | case 1: tmp = "in"; break; | |
493 | case 2: tmp = "setup"; break; | |
494 | default: tmp = "?"; break; | |
495 | } tmp;}), | |
496 | (scratch >> 16) & 0x7fff, | |
497 | scratch, | |
498 | td->urb); | |
e64a5219 | 499 | if (size < temp) |
1da177e4 LT |
500 | temp = size; |
501 | size -= temp; | |
502 | next += temp; | |
503 | if (temp == size) | |
504 | goto done; | |
505 | } | |
506 | ||
507 | temp = snprintf (next, size, "\n"); | |
e64a5219 | 508 | if (size < temp) |
1da177e4 LT |
509 | temp = size; |
510 | size -= temp; | |
511 | next += temp; | |
512 | ||
513 | done: | |
514 | *sizep = size; | |
515 | *nextp = next; | |
516 | } | |
517 | ||
694cc208 | 518 | static ssize_t fill_async_buffer(struct debug_buffer *buf) |
1da177e4 | 519 | { |
1da177e4 LT |
520 | struct usb_hcd *hcd; |
521 | struct ehci_hcd *ehci; | |
522 | unsigned long flags; | |
523 | unsigned temp, size; | |
524 | char *next; | |
525 | struct ehci_qh *qh; | |
526 | ||
694cc208 | 527 | hcd = bus_to_hcd(buf->bus); |
1da177e4 | 528 | ehci = hcd_to_ehci (hcd); |
3c04e20e ML |
529 | next = buf->output_buf; |
530 | size = buf->alloc_size; | |
1da177e4 | 531 | |
694cc208 TJ |
532 | *next = 0; |
533 | ||
1da177e4 LT |
534 | /* dumps a snapshot of the async schedule. |
535 | * usually empty except for long-term bulk reads, or head. | |
536 | * one QH per line, and TDs we know about | |
537 | */ | |
538 | spin_lock_irqsave (&ehci->lock, flags); | |
539 | for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh) | |
540 | qh_lines (ehci, qh, &next, &size); | |
541 | if (ehci->reclaim && size > 0) { | |
542 | temp = scnprintf (next, size, "\nreclaim =\n"); | |
543 | size -= temp; | |
544 | next += temp; | |
545 | ||
546 | for (qh = ehci->reclaim; size > 0 && qh; qh = qh->reclaim) | |
547 | qh_lines (ehci, qh, &next, &size); | |
548 | } | |
549 | spin_unlock_irqrestore (&ehci->lock, flags); | |
550 | ||
3c04e20e | 551 | return strlen(buf->output_buf); |
1da177e4 | 552 | } |
1da177e4 LT |
553 | |
554 | #define DBG_SCHED_LIMIT 64 | |
694cc208 | 555 | static ssize_t fill_periodic_buffer(struct debug_buffer *buf) |
1da177e4 | 556 | { |
1da177e4 LT |
557 | struct usb_hcd *hcd; |
558 | struct ehci_hcd *ehci; | |
559 | unsigned long flags; | |
560 | union ehci_shadow p, *seen; | |
561 | unsigned temp, size, seen_count; | |
562 | char *next; | |
563 | unsigned i; | |
6dbd682b | 564 | __hc32 tag; |
1da177e4 | 565 | |
54e6ecb2 | 566 | if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC))) |
1da177e4 LT |
567 | return 0; |
568 | seen_count = 0; | |
569 | ||
694cc208 | 570 | hcd = bus_to_hcd(buf->bus); |
1da177e4 | 571 | ehci = hcd_to_ehci (hcd); |
3c04e20e ML |
572 | next = buf->output_buf; |
573 | size = buf->alloc_size; | |
1da177e4 LT |
574 | |
575 | temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size); | |
576 | size -= temp; | |
577 | next += temp; | |
578 | ||
579 | /* dump a snapshot of the periodic schedule. | |
580 | * iso changes, interrupt usually doesn't. | |
581 | */ | |
582 | spin_lock_irqsave (&ehci->lock, flags); | |
583 | for (i = 0; i < ehci->periodic_size; i++) { | |
584 | p = ehci->pshadow [i]; | |
585 | if (likely (!p.ptr)) | |
586 | continue; | |
6dbd682b | 587 | tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]); |
1da177e4 LT |
588 | |
589 | temp = scnprintf (next, size, "%4d: ", i); | |
590 | size -= temp; | |
591 | next += temp; | |
592 | ||
593 | do { | |
3807e26d AD |
594 | struct ehci_qh_hw *hw; |
595 | ||
6dbd682b | 596 | switch (hc32_to_cpu(ehci, tag)) { |
1da177e4 | 597 | case Q_TYPE_QH: |
3807e26d | 598 | hw = p.qh->hw; |
1da177e4 LT |
599 | temp = scnprintf (next, size, " qh%d-%04x/%p", |
600 | p.qh->period, | |
6dbd682b | 601 | hc32_to_cpup(ehci, |
3807e26d | 602 | &hw->hw_info2) |
1da177e4 | 603 | /* uframe masks */ |
7dedacf4 | 604 | & (QH_CMASK | QH_SMASK), |
1da177e4 LT |
605 | p.qh); |
606 | size -= temp; | |
607 | next += temp; | |
608 | /* don't repeat what follows this qh */ | |
609 | for (temp = 0; temp < seen_count; temp++) { | |
610 | if (seen [temp].ptr != p.ptr) | |
611 | continue; | |
3c4bb71f | 612 | if (p.qh->qh_next.ptr) { |
1da177e4 LT |
613 | temp = scnprintf (next, size, |
614 | " ..."); | |
3c4bb71f ML |
615 | size -= temp; |
616 | next += temp; | |
617 | } | |
1da177e4 LT |
618 | break; |
619 | } | |
620 | /* show more info the first time around */ | |
3c4bb71f | 621 | if (temp == seen_count) { |
6dbd682b | 622 | u32 scratch = hc32_to_cpup(ehci, |
3807e26d | 623 | &hw->hw_info1); |
1da177e4 LT |
624 | struct ehci_qtd *qtd; |
625 | char *type = ""; | |
626 | ||
627 | /* count tds, get ep direction */ | |
628 | temp = 0; | |
629 | list_for_each_entry (qtd, | |
630 | &p.qh->qtd_list, | |
631 | qtd_list) { | |
632 | temp++; | |
6dbd682b SR |
633 | switch (0x03 & (hc32_to_cpu( |
634 | ehci, | |
1da177e4 LT |
635 | qtd->hw_token) >> 8)) { |
636 | case 0: type = "out"; continue; | |
637 | case 1: type = "in"; continue; | |
638 | } | |
639 | } | |
640 | ||
641 | temp = scnprintf (next, size, | |
642 | " (%c%d ep%d%s " | |
643 | "[%d/%d] q%d p%d)", | |
644 | speed_char (scratch), | |
645 | scratch & 0x007f, | |
646 | (scratch >> 8) & 0x000f, type, | |
647 | p.qh->usecs, p.qh->c_usecs, | |
648 | temp, | |
649 | 0x7ff & (scratch >> 16)); | |
650 | ||
651 | if (seen_count < DBG_SCHED_LIMIT) | |
652 | seen [seen_count++].qh = p.qh; | |
653 | } else | |
654 | temp = 0; | |
655 | if (p.qh) { | |
3807e26d | 656 | tag = Q_NEXT_TYPE(ehci, hw->hw_next); |
1da177e4 LT |
657 | p = p.qh->qh_next; |
658 | } | |
659 | break; | |
660 | case Q_TYPE_FSTN: | |
661 | temp = scnprintf (next, size, | |
662 | " fstn-%8x/%p", p.fstn->hw_prev, | |
663 | p.fstn); | |
6dbd682b | 664 | tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next); |
1da177e4 LT |
665 | p = p.fstn->fstn_next; |
666 | break; | |
667 | case Q_TYPE_ITD: | |
668 | temp = scnprintf (next, size, | |
669 | " itd/%p", p.itd); | |
6dbd682b | 670 | tag = Q_NEXT_TYPE(ehci, p.itd->hw_next); |
1da177e4 LT |
671 | p = p.itd->itd_next; |
672 | break; | |
673 | case Q_TYPE_SITD: | |
674 | temp = scnprintf (next, size, | |
675 | " sitd%d-%04x/%p", | |
676 | p.sitd->stream->interval, | |
6dbd682b | 677 | hc32_to_cpup(ehci, &p.sitd->hw_uframe) |
1da177e4 LT |
678 | & 0x0000ffff, |
679 | p.sitd); | |
6dbd682b | 680 | tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next); |
1da177e4 LT |
681 | p = p.sitd->sitd_next; |
682 | break; | |
683 | } | |
684 | size -= temp; | |
685 | next += temp; | |
686 | } while (p.ptr); | |
687 | ||
688 | temp = scnprintf (next, size, "\n"); | |
689 | size -= temp; | |
690 | next += temp; | |
691 | } | |
692 | spin_unlock_irqrestore (&ehci->lock, flags); | |
693 | kfree (seen); | |
694 | ||
3c04e20e | 695 | return buf->alloc_size - size; |
1da177e4 | 696 | } |
1da177e4 LT |
697 | #undef DBG_SCHED_LIMIT |
698 | ||
e8799906 AS |
699 | static const char *rh_state_string(struct ehci_hcd *ehci) |
700 | { | |
701 | switch (ehci->rh_state) { | |
702 | case EHCI_RH_HALTED: | |
703 | return "halted"; | |
704 | case EHCI_RH_SUSPENDED: | |
705 | return "suspended"; | |
706 | case EHCI_RH_RUNNING: | |
707 | return "running"; | |
708 | } | |
709 | return "?"; | |
710 | } | |
711 | ||
694cc208 | 712 | static ssize_t fill_registers_buffer(struct debug_buffer *buf) |
1da177e4 | 713 | { |
1da177e4 LT |
714 | struct usb_hcd *hcd; |
715 | struct ehci_hcd *ehci; | |
716 | unsigned long flags; | |
717 | unsigned temp, size, i; | |
718 | char *next, scratch [80]; | |
719 | static char fmt [] = "%*s\n"; | |
720 | static char label [] = ""; | |
721 | ||
694cc208 | 722 | hcd = bus_to_hcd(buf->bus); |
1da177e4 | 723 | ehci = hcd_to_ehci (hcd); |
3c04e20e ML |
724 | next = buf->output_buf; |
725 | size = buf->alloc_size; | |
1da177e4 LT |
726 | |
727 | spin_lock_irqsave (&ehci->lock, flags); | |
728 | ||
541c7d43 | 729 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
1da177e4 | 730 | size = scnprintf (next, size, |
2b70f073 | 731 | "bus %s, device %s\n" |
d49d4317 | 732 | "%s\n" |
1da177e4 LT |
733 | "SUSPENDED (no register access)\n", |
734 | hcd->self.controller->bus->name, | |
7071a3ce | 735 | dev_name(hcd->self.controller), |
d49d4317 | 736 | hcd->product_desc); |
1da177e4 LT |
737 | goto done; |
738 | } | |
739 | ||
740 | /* Capability Registers */ | |
c430131a | 741 | i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); |
1da177e4 | 742 | temp = scnprintf (next, size, |
2b70f073 | 743 | "bus %s, device %s\n" |
d49d4317 | 744 | "%s\n" |
e8799906 | 745 | "EHCI %x.%02x, rh state %s\n", |
1da177e4 | 746 | hcd->self.controller->bus->name, |
7071a3ce | 747 | dev_name(hcd->self.controller), |
d49d4317 | 748 | hcd->product_desc, |
e8799906 | 749 | i >> 8, i & 0x0ff, rh_state_string(ehci)); |
1da177e4 LT |
750 | size -= temp; |
751 | next += temp; | |
752 | ||
d49d4317 DB |
753 | #ifdef CONFIG_PCI |
754 | /* EHCI 0.96 and later may have "extended capabilities" */ | |
755 | if (hcd->self.controller->bus == &pci_bus_type) { | |
756 | struct pci_dev *pdev; | |
757 | u32 offset, cap, cap2; | |
758 | unsigned count = 256/4; | |
759 | ||
760 | pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller); | |
6dbd682b SR |
761 | offset = HCC_EXT_CAPS(ehci_readl(ehci, |
762 | &ehci->caps->hcc_params)); | |
d49d4317 DB |
763 | while (offset && count--) { |
764 | pci_read_config_dword (pdev, offset, &cap); | |
765 | switch (cap & 0xff) { | |
766 | case 1: | |
767 | temp = scnprintf (next, size, | |
768 | "ownership %08x%s%s\n", cap, | |
769 | (cap & (1 << 24)) ? " linux" : "", | |
770 | (cap & (1 << 16)) ? " firmware" : ""); | |
771 | size -= temp; | |
772 | next += temp; | |
773 | ||
774 | offset += 4; | |
775 | pci_read_config_dword (pdev, offset, &cap2); | |
776 | temp = scnprintf (next, size, | |
777 | "SMI sts/enable 0x%08x\n", cap2); | |
778 | size -= temp; | |
779 | next += temp; | |
780 | break; | |
781 | case 0: /* illegal reserved capability */ | |
782 | cap = 0; | |
783 | /* FALLTHROUGH */ | |
784 | default: /* unknown */ | |
785 | break; | |
786 | } | |
787 | temp = (cap >> 8) & 0xff; | |
788 | } | |
789 | } | |
790 | #endif | |
791 | ||
1da177e4 | 792 | // FIXME interpret both types of params |
083522d7 | 793 | i = ehci_readl(ehci, &ehci->caps->hcs_params); |
1da177e4 LT |
794 | temp = scnprintf (next, size, "structural params 0x%08x\n", i); |
795 | size -= temp; | |
796 | next += temp; | |
797 | ||
083522d7 | 798 | i = ehci_readl(ehci, &ehci->caps->hcc_params); |
1da177e4 LT |
799 | temp = scnprintf (next, size, "capability params 0x%08x\n", i); |
800 | size -= temp; | |
801 | next += temp; | |
802 | ||
803 | /* Operational Registers */ | |
804 | temp = dbg_status_buf (scratch, sizeof scratch, label, | |
083522d7 | 805 | ehci_readl(ehci, &ehci->regs->status)); |
1da177e4 LT |
806 | temp = scnprintf (next, size, fmt, temp, scratch); |
807 | size -= temp; | |
808 | next += temp; | |
809 | ||
810 | temp = dbg_command_buf (scratch, sizeof scratch, label, | |
083522d7 | 811 | ehci_readl(ehci, &ehci->regs->command)); |
1da177e4 LT |
812 | temp = scnprintf (next, size, fmt, temp, scratch); |
813 | size -= temp; | |
814 | next += temp; | |
815 | ||
816 | temp = dbg_intr_buf (scratch, sizeof scratch, label, | |
083522d7 | 817 | ehci_readl(ehci, &ehci->regs->intr_enable)); |
1da177e4 LT |
818 | temp = scnprintf (next, size, fmt, temp, scratch); |
819 | size -= temp; | |
820 | next += temp; | |
821 | ||
822 | temp = scnprintf (next, size, "uframe %04x\n", | |
68aa95d5 | 823 | ehci_read_frame_index(ehci)); |
1da177e4 LT |
824 | size -= temp; |
825 | next += temp; | |
826 | ||
d49d4317 DB |
827 | for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) { |
828 | temp = dbg_port_buf (scratch, sizeof scratch, label, i, | |
6dbd682b SR |
829 | ehci_readl(ehci, |
830 | &ehci->regs->port_status[i - 1])); | |
1da177e4 LT |
831 | temp = scnprintf (next, size, fmt, temp, scratch); |
832 | size -= temp; | |
833 | next += temp; | |
d49d4317 DB |
834 | if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) { |
835 | temp = scnprintf (next, size, | |
836 | " debug control %08x\n", | |
6dbd682b SR |
837 | ehci_readl(ehci, |
838 | &ehci->debug->control)); | |
d49d4317 DB |
839 | size -= temp; |
840 | next += temp; | |
841 | } | |
1da177e4 LT |
842 | } |
843 | ||
844 | if (ehci->reclaim) { | |
07d29b63 | 845 | temp = scnprintf(next, size, "reclaim qh %p\n", ehci->reclaim); |
1da177e4 LT |
846 | size -= temp; |
847 | next += temp; | |
848 | } | |
849 | ||
850 | #ifdef EHCI_STATS | |
851 | temp = scnprintf (next, size, | |
852 | "irq normal %ld err %ld reclaim %ld (lost %ld)\n", | |
853 | ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim, | |
854 | ehci->stats.lost_iaa); | |
855 | size -= temp; | |
856 | next += temp; | |
857 | ||
858 | temp = scnprintf (next, size, "complete %ld unlink %ld\n", | |
859 | ehci->stats.complete, ehci->stats.unlink); | |
860 | size -= temp; | |
861 | next += temp; | |
862 | #endif | |
863 | ||
864 | done: | |
865 | spin_unlock_irqrestore (&ehci->lock, flags); | |
866 | ||
3c04e20e | 867 | return buf->alloc_size - size; |
1da177e4 | 868 | } |
1da177e4 | 869 | |
694cc208 TJ |
870 | static struct debug_buffer *alloc_buffer(struct usb_bus *bus, |
871 | ssize_t (*fill_func)(struct debug_buffer *)) | |
1da177e4 | 872 | { |
694cc208 TJ |
873 | struct debug_buffer *buf; |
874 | ||
875 | buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); | |
1da177e4 | 876 | |
694cc208 TJ |
877 | if (buf) { |
878 | buf->bus = bus; | |
879 | buf->fill_func = fill_func; | |
880 | mutex_init(&buf->mutex); | |
3c04e20e | 881 | buf->alloc_size = PAGE_SIZE; |
694cc208 TJ |
882 | } |
883 | ||
884 | return buf; | |
1da177e4 LT |
885 | } |
886 | ||
694cc208 | 887 | static int fill_buffer(struct debug_buffer *buf) |
1da177e4 | 888 | { |
694cc208 TJ |
889 | int ret = 0; |
890 | ||
3c04e20e | 891 | if (!buf->output_buf) |
73f35c60 | 892 | buf->output_buf = vmalloc(buf->alloc_size); |
694cc208 | 893 | |
3c04e20e | 894 | if (!buf->output_buf) { |
694cc208 TJ |
895 | ret = -ENOMEM; |
896 | goto out; | |
897 | } | |
898 | ||
899 | ret = buf->fill_func(buf); | |
1da177e4 | 900 | |
694cc208 TJ |
901 | if (ret >= 0) { |
902 | buf->count = ret; | |
903 | ret = 0; | |
904 | } | |
905 | ||
906 | out: | |
907 | return ret; | |
1da177e4 LT |
908 | } |
909 | ||
694cc208 TJ |
910 | static ssize_t debug_output(struct file *file, char __user *user_buf, |
911 | size_t len, loff_t *offset) | |
912 | { | |
913 | struct debug_buffer *buf = file->private_data; | |
914 | int ret = 0; | |
915 | ||
916 | mutex_lock(&buf->mutex); | |
917 | if (buf->count == 0) { | |
918 | ret = fill_buffer(buf); | |
919 | if (ret != 0) { | |
920 | mutex_unlock(&buf->mutex); | |
921 | goto out; | |
922 | } | |
923 | } | |
924 | mutex_unlock(&buf->mutex); | |
925 | ||
926 | ret = simple_read_from_buffer(user_buf, len, offset, | |
3c04e20e | 927 | buf->output_buf, buf->count); |
694cc208 TJ |
928 | |
929 | out: | |
930 | return ret; | |
931 | ||
932 | } | |
933 | ||
934 | static int debug_close(struct inode *inode, struct file *file) | |
935 | { | |
936 | struct debug_buffer *buf = file->private_data; | |
1da177e4 | 937 | |
694cc208 | 938 | if (buf) { |
f8086a07 | 939 | vfree(buf->output_buf); |
694cc208 TJ |
940 | kfree(buf); |
941 | } | |
942 | ||
943 | return 0; | |
944 | } | |
945 | static int debug_async_open(struct inode *inode, struct file *file) | |
946 | { | |
947 | file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); | |
948 | ||
949 | return file->private_data ? 0 : -ENOMEM; | |
950 | } | |
951 | ||
952 | static int debug_periodic_open(struct inode *inode, struct file *file) | |
953 | { | |
3c04e20e ML |
954 | struct debug_buffer *buf; |
955 | buf = alloc_buffer(inode->i_private, fill_periodic_buffer); | |
956 | if (!buf) | |
957 | return -ENOMEM; | |
694cc208 | 958 | |
3c04e20e ML |
959 | buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE; |
960 | file->private_data = buf; | |
961 | return 0; | |
694cc208 TJ |
962 | } |
963 | ||
964 | static int debug_registers_open(struct inode *inode, struct file *file) | |
965 | { | |
966 | file->private_data = alloc_buffer(inode->i_private, | |
967 | fill_registers_buffer); | |
968 | ||
969 | return file->private_data ? 0 : -ENOMEM; | |
970 | } | |
971 | ||
aa4d8342 AD |
972 | static int debug_lpm_close(struct inode *inode, struct file *file) |
973 | { | |
974 | return 0; | |
975 | } | |
976 | ||
977 | static ssize_t debug_lpm_read(struct file *file, char __user *user_buf, | |
978 | size_t count, loff_t *ppos) | |
979 | { | |
980 | /* TODO: show lpm stats */ | |
981 | return 0; | |
982 | } | |
983 | ||
984 | static ssize_t debug_lpm_write(struct file *file, const char __user *user_buf, | |
985 | size_t count, loff_t *ppos) | |
986 | { | |
987 | struct usb_hcd *hcd; | |
988 | struct ehci_hcd *ehci; | |
989 | char buf[50]; | |
990 | size_t len; | |
991 | u32 temp; | |
992 | unsigned long port; | |
993 | u32 __iomem *portsc ; | |
994 | u32 params; | |
995 | ||
996 | hcd = bus_to_hcd(file->private_data); | |
997 | ehci = hcd_to_ehci(hcd); | |
998 | ||
999 | len = min(count, sizeof(buf) - 1); | |
1000 | if (copy_from_user(buf, user_buf, len)) | |
1001 | return -EFAULT; | |
1002 | buf[len] = '\0'; | |
1003 | if (len > 0 && buf[len - 1] == '\n') | |
1004 | buf[len - 1] = '\0'; | |
1005 | ||
1006 | if (strncmp(buf, "enable", 5) == 0) { | |
1007 | if (strict_strtoul(buf + 7, 10, &port)) | |
1008 | return -EINVAL; | |
1009 | params = ehci_readl(ehci, &ehci->caps->hcs_params); | |
1010 | if (port > HCS_N_PORTS(params)) { | |
1011 | ehci_dbg(ehci, "ERR: LPM on bad port %lu\n", port); | |
1012 | return -ENODEV; | |
1013 | } | |
1014 | portsc = &ehci->regs->port_status[port-1]; | |
1015 | temp = ehci_readl(ehci, portsc); | |
1016 | if (!(temp & PORT_DEV_ADDR)) { | |
1017 | ehci_dbg(ehci, "LPM: no device attached\n"); | |
1018 | return -ENODEV; | |
1019 | } | |
1020 | temp |= PORT_LPM; | |
1021 | ehci_writel(ehci, temp, portsc); | |
1022 | printk(KERN_INFO "force enable LPM for port %lu\n", port); | |
1023 | } else if (strncmp(buf, "hird=", 5) == 0) { | |
1024 | unsigned long hird; | |
1025 | if (strict_strtoul(buf + 5, 16, &hird)) | |
1026 | return -EINVAL; | |
1027 | printk(KERN_INFO "setting hird %s %lu\n", buf + 6, hird); | |
3d9545cc AS |
1028 | ehci->command = (ehci->command & ~CMD_HIRD) | (hird << 24); |
1029 | ehci_writel(ehci, ehci->command, &ehci->regs->command); | |
aa4d8342 AD |
1030 | } else if (strncmp(buf, "disable", 7) == 0) { |
1031 | if (strict_strtoul(buf + 8, 10, &port)) | |
1032 | return -EINVAL; | |
1033 | params = ehci_readl(ehci, &ehci->caps->hcs_params); | |
1034 | if (port > HCS_N_PORTS(params)) { | |
1035 | ehci_dbg(ehci, "ERR: LPM off bad port %lu\n", port); | |
1036 | return -ENODEV; | |
1037 | } | |
1038 | portsc = &ehci->regs->port_status[port-1]; | |
1039 | temp = ehci_readl(ehci, portsc); | |
1040 | if (!(temp & PORT_DEV_ADDR)) { | |
1041 | ehci_dbg(ehci, "ERR: no device attached\n"); | |
1042 | return -ENODEV; | |
1043 | } | |
1044 | temp &= ~PORT_LPM; | |
1045 | ehci_writel(ehci, temp, portsc); | |
1046 | printk(KERN_INFO "disabled LPM for port %lu\n", port); | |
1047 | } else | |
1048 | return -EOPNOTSUPP; | |
1049 | return count; | |
1050 | } | |
1051 | ||
694cc208 TJ |
1052 | static inline void create_debug_files (struct ehci_hcd *ehci) |
1053 | { | |
1054 | struct usb_bus *bus = &ehci_to_hcd(ehci)->self; | |
1055 | ||
1056 | ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root); | |
1057 | if (!ehci->debug_dir) | |
185c9bcf ML |
1058 | return; |
1059 | ||
1060 | if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus, | |
1061 | &debug_async_fops)) | |
1062 | goto file_error; | |
1063 | ||
1064 | if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus, | |
1065 | &debug_periodic_fops)) | |
1066 | goto file_error; | |
1067 | ||
1068 | if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus, | |
1069 | &debug_registers_fops)) | |
1070 | goto file_error; | |
1071 | ||
723b991a | 1072 | if (!debugfs_create_file("lpm", S_IRUGO|S_IWUSR, ehci->debug_dir, bus, |
185c9bcf ML |
1073 | &debug_lpm_fops)) |
1074 | goto file_error; | |
1075 | ||
694cc208 TJ |
1076 | return; |
1077 | ||
185c9bcf ML |
1078 | file_error: |
1079 | debugfs_remove_recursive(ehci->debug_dir); | |
694cc208 TJ |
1080 | } |
1081 | ||
1082 | static inline void remove_debug_files (struct ehci_hcd *ehci) | |
1083 | { | |
185c9bcf | 1084 | debugfs_remove_recursive(ehci->debug_dir); |
694cc208 TJ |
1085 | } |
1086 | ||
1087 | #endif /* STUB_DEBUG_FILES */ |